JPH0522595Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) This invention relates to a locking device that locks an opening/closing lid for a vehicle, such as a trunk, when it is closed and unlocks it when it is opened.

(Technical background) It is necessary for an opening/closing lid of a vehicle trunk or the like to maintain a closed state when the lid is closed, and to release the closed state when opening the lid. Such a function is generally achieved by a striker provided on one side of the opening/closing lid or the vehicle body, and a locking device provided on the other side. As shown in FIG. 9, the lock device includes a rotary latch b for engaging and disengaging the striker a, and a latch c for engaging and disengaging the rotary latch b.
When the opening/closing lid is closed, as shown in FIG. 10, when the striker a moving in the direction of the solid line arrow engages the rotating latch b, the rotating latch b is moved to a predetermined position while resisting the biasing force of a spring (not shown) in the direction of the broken line arrow. At the same time, the latch c is rotationally displaced in the direction of the solid line arrow by the urging force of the spring d in the direction of the broken line arrow, and engages with a predetermined portion of the rotary latch b. In this state, when the rotational return is inhibited and the latch c is rotationally displaced in the direction opposite to the biasing direction of the spring d to separate from the rotational latch b, the rotational latch b
is rotated back by the biasing force of a spring (not shown), and the striker a is thereby rotated to the rotating latch b.
(the state shown in FIG. 9). When opening the opening/closing lid body, the latch c, which is engaged with the rotary latch b as described above, is rotated in the direction opposite to the biasing direction of the spring d to be disengaged from the rotary latch b.
The rotational displacement is performed by an operating lever disposed at the driver's seat or by turning on a start switch of an actuator such as a motor connected to the ratchet c.

(Prior Art and Problems) In the above locking device, conventionally, the side end surface e of the latch c is in contact with the circumferential surface f of the rotary latch b when the opening/closing lid body is in the open state as shown in FIG. , when the opening/closing lid shown in FIG. 10 is in the closed state, the upper end surface g is in contact with the cutout surface h of the rotary latch b.

However, in such a conventional structure, when the rotary latch b and the engaged latch c are rotationally displaced in the direction opposite to the biasing direction of the spring d,
Rotating latch b with both biasing forces acting
Since the upper end surface g, which is in contact with the notch surface h, is brought into sliding contact with the notch surface h, frictional resistance is large, and this requires a high operating force. Therefore, when the rotational displacement of the ratchet c is automatically carried out using an actuator such as a motor, an actuator having a torque that overcomes the above-mentioned frictional resistance is required, which causes the lock device to become larger.

In addition, in the case of a locking device in which the rotational displacement of the latch c is performed by an actuator such as a motor, if the amount of electricity stored in the battery becomes zero and the actuator stops functioning, the unlocking function cannot be achieved. There was a problem.

(Purpose of the invention) Therefore, this invention was made in view of the above-mentioned circumstances, and is aimed at suppressing the frictional resistance when rotating and displacing the latch that is engaged with the rotating latch in the direction opposite to the biasing direction of the spring. In addition to making it possible to rotate the ratchet with a small operating force, even in an emergency when the motor that rotates the ratchet in the direction opposite to the biasing direction of the spring does not function, the ratchet can be rotated and displaced manually. An object of the present invention is to provide a locking device for a vehicle opening/closing lid that can perform a locking function.

(Structure of the invention) In order to achieve the above object, this invention includes a rotary latch for engaging and disengaging the striker provided on the opening/closing lid body or the vehicle body, a ratchet for engaging and disengaging the rotary latch, and a rotary latch for engaging and disengaging the rotary latch. The rotary latch is provided with a motor for disengaging from the latch, and a gear reduction mechanism interposed between the motor and the latch, and when the striker engages with the rotary latch when the opening/closing lid is closed, the rotary latch is biased. The latch is rotationally displaced to a predetermined position while resisting the force, and the latch is rotationally displaced by the force and engages with a predetermined portion of the rotary latch to prevent the rotary latch from rotating back. When the motor rotationally displaces the latch in the opposite biasing direction and separates it from the rotating latch, the rotating latch returns to rotation due to the biasing force, thereby causing the striker to separate from the rotating latch. It is a body locking device, which is in contact with the side end surface of the ratchet when the opening/closing lid is opened, and when the rotary latch rotates and displaces when the opening/closing lid is closed, it is in contact with the side end surface of the ratchet. The rotary latch is provided with a rotating member that rolls and displaces approximately to the center of the arc-shaped tip surface, and the ratchet is arranged on the axis of the final gear of the gear reduction mechanism so as to rotate together with the final gear. When the shaft is rotatably fitted to the shaft and rotated by an external operation, it comes into contact with a protrusion engaging portion provided on the side end surface of the final gear, thereby rotating the final gear in the direction opposite to the biasing direction of the ratchet. It is equipped with levers.

(Embodiment of the invention) Hereinafter, an embodiment of the invention will be described based on the drawings.

FIG. 1 is a plan view of an embodiment of this invention, FIG. 2 is a side view of the same, and FIG. 3 is a sectional view taken along the line - in FIG.

In the figure, 1 indicates detachable covers 1a and 1b.
2 is a rotating latch, 3 is a ratchet, 4 is a motor, and 5 is a gear reduction mechanism.

The rotary latch 2 is attached to a shaft 6 fixed to the case 1, and is rotated about the shaft 6, and is biased by a spring 7 in the direction of the dashed arrow.

A ratchet 3 is a gear (spur gear) reduction mechanism 5 rotatably mounted on the case 1, and a fourth
It is formed integrally with the shaft 13 of the gear 14, and the shaft 1
It is rotated around 3, and a biasing force is applied by a spring 8 in the direction of the dashed arrow.

The motor 4 is fixed to the case 1, and is driven when electric power is supplied from a controller (not shown).

The gear reduction mechanism 5 includes a first gear 9 attached to the shaft 4a of the motor 4, and a second gear 11 and a third gear fixed to a shaft 10 rotatably attached to the case 1.
It consists of a gear 12 and a fourth gear (final gear) 14 mounted on the shaft 13. 1st gear 9 and 2nd gear
The gears 11 are in mesh to reduce the rotational power of the motor 4 and transmit it to the shaft 10, and the third gear 12 and the fourth gear 14 are in mesh to reduce the rotational power of the motor 4 and transmit it to the shaft 13. It is designed to communicate. Therefore, when the motor 4 is driven, its rotational power is reduced to a predetermined speed by the gear reduction mechanism 5 and transmitted to the shaft 13.
is rotationally displaced in the direction of the solid arrow while resisting the spring 8.

The fourth gear 14 attached to the shaft 13 is rotatably fitted to the shaft 13, but as shown in FIG. The rotational power is transmitted to the ratchet 3 by fitting into the engagement groove 14b provided on the end face 14a.

Further, a lever 15 is attached to the side end of the shaft 13 for rotationally displacing the ratchet 3 in the direction of the solid line arrow against the spring 8 by external operation. The lever 15 is rotatably fitted onto the shaft 13, and when the lever 15 is rotated in the direction of the solid line arrow, the side end surface 15a of the lever 15 is connected to the fourth gear 14 as shown in FIG.
14 d of engagement protrusions provided on the side end surface 14 c of
, and rotates the ratchet 3 in the direction of the solid arrow while resisting the spring 8. Such a lever 15 is operated by an operation lever (not shown) located at the driver's seat. A release wire cable 16 connects the operating lever and the lever 15. In addition, when two of the present locking devices are installed for one opening/closing lid, the lever 15 of the other locking device and the shaft 1 of the locking device of the embodiment are connected.
If a lever 21 mounted in the same manner as the lever 15 is connected to the other end of the lever 3 with a release wire cable 22 or the like, the release wire cable 22 or the like can be used to lock other locks when the lock device of the embodiment is unlocked. Devices can be unlocked in conjunction with each other.

A roller (rotating member 17) as shown in FIG. 6 is provided on the latch side surface 2a of the rotary latch 2, eccentric to the shaft 6. The roller 17 is mounted via a bearing 19 on a shaft 18 which is fixed perpendicularly to the wall 2b of the rotary latch 2.
Such a roller 17 is in contact with the side end surface 3b of the ratchet 3 when the rotary latch 2 is in the state shown in FIG. 7, that is, when the opening/closing lid is in the open state, and when the rotary latch 2 is in the state shown in FIG. When the opening/closing lid body is in the closed state, as the rotary latch 2 is rotationally displaced in the direction of the solid line arrow by the striker 20, which moves in the direction of the solid line arrow, an arc-shaped arc is formed from the side end surface 3b of the latch 3, which is rotationally displaced in the direction of the solid line arrow. Tip surface 3c
It rolls and displaces to approximately the center of. Rotating latch 2
is the ratchet 3 with the roller 17 returning to rotation.
By contacting the center portion of the distal end surface 3c, rotational return is inhibited. In other words, the locked state (locked) is maintained.

When the above-mentioned locked state is released (unlocked) by rotationally displacing the latch 3 in the opposite biasing direction, the rotary latch 2 rotates back in the biasing direction as the ratchet 3 rotates; The roller 17 that is in contact with the tip surface 3c of 3 is the tip surface 3c.
While rolling, it moves to the side end surface 3b. The urging forces of both the latch 3 and the rotating latch 2 act between the distal end surface 3c of the latch 3 and the roller 17, but the state of engagement between the latch 3 and the rotating latch 2 is determined by the rolling of the roller 17. Since the latch is released, the frictional resistance is small, and therefore, rotational displacement of the ratchet 3 can be achieved with a small operating force.

Therefore, the rotational displacement of the ratchet 3 when unlocking is caused by the relatively small torque motor 4 and gear reduction mechanism 5.
Therefore, even if the locking device is equipped with the motor 4 and the gear reduction mechanism 5 as shown in the example, it can be constructed compactly without increasing the size.

Furthermore, in the event that the motor 4 is not driven (in an emergency), the lever 15 can be rotated by the operating lever to move the ratchet 3 to the spring 8.
It is possible to release the lock from the rotary latch 2 by rotationally displacing it in the direction of the solid arrow while resisting. Note that the lever 15 is rotatably fitted onto the shaft 13, and engages with the engaging protrusion 14d to rotate the shaft 13 only when the operating lever is operated.When the operating lever is not operated, That is, when the latch 3 is disengaged from the rotating latch 2 by the motor 4, it does not interfere with the rotation of the rotating shaft 13, and since it does not rotate together with the rotating shaft 13, it does not become a load on the motor 4.

(Effects of the invention) In summary, the locking device for a vehicle opening/closing lid according to the invention includes a rotary latch that engages/disengages a striker provided on the opening/closing lid or the vehicle body, and a latch that engages/disengages the rotary latch. a motor for disengaging the ratchet from the rotary latch; and a gear reduction mechanism interposed between the motor and the ratchet, the striker being engaged with the rotary latch when the opening/closing lid is closed. When the latch is engaged, the rotary latch is rotated to a predetermined position while resisting the biasing force, and the latch is rotationally displaced by the biasing force and engages with a predetermined portion of the rotary latch, thereby preventing the rotary latch from rotating back. At the same time, in this state, when the motor rotationally displaces the latch in the opposite biasing direction and separates it from the rotary latch, the rotary latch returns to rotation due to the biasing force, whereby the striker is released from the rotary latch. This is a removable locking device for a vehicle lid, which is in contact with the side end surface of the ratchet when the opening/closing lid is opened, and when the rotary latch rotates and displaces when the opening/closing lid is closed. Accordingly, a rotating member is provided on the rotary latch that rolls and displaces from the side end surface of the latch to approximately the center of the arcuate tip surface, and rotates integrally with the final gear on the axis of the final gear of the gear reduction mechanism. When the ratchet is arranged so as to be rotatably fitted to the shaft and rotated by an external operation, it comes into contact with a protrusion engaging portion provided on the side end surface of the final gear, and the final gear is moved onto the ratchet. Since the lever is arranged to rotate in the counter-biasing direction, the load applied to the ratchet when the latch is unlocked by rotationally displacing the ratchet in the counter-biasing direction by the rotating member can be suppressed to a significantly low level. Rotational displacement of the ratchet can now be performed with a small operating force.
For this reason, the motor and gear reduction mechanism that perform unlocking can be of relatively low torque.
There is no need to increase the size of the lock device. Furthermore, the latch can be disengaged from the rotary latch by rotating the lever by external operation, so there is the advantage that the lock can be unlocked even if the motor is not driven. This structure is suitable for a locking device that uses a motor to unlock the lock.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of this invention, Fig. 2 is a side view of the same, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a diagram showing the relationship between the fourth gear and the ratchet. A perspective view illustrating the mating relationship, FIG. 5 is a perspective view showing an engagement protrusion that engages with a lever provided on one end surface of the fourth gear, and FIG. 6 is a rotating member provided on the rotation latch. 7 is a schematic diagram showing the relationship between the rotary latch, the ratchet, and the striker when the lid is opened, and FIG. 8 is a schematic diagram showing the relationship between the rotary latch, the ratchet, and the striker when the lid is closed. FIGS. 9 and 10 are schematic diagrams illustrating conventional locking devices, respectively. 2...Rotating latch, 3...Ratchet, 3b...
...Side end surface, 3c...Tip surface, 4...Motor, 5...
...Gear reduction mechanism, 7, 8...Spring, 13...
...shaft, 14...4th gear (final gear), 14c...
Side end surface, 14d... engaging protrusion, 15... lever,
17... roller (rotating member), 20... striker.

Claims (1)

[Scope of utility model registration request] A rotary latch that engages and disengages a striker provided on the opening/closing lid body or the vehicle body, a latch that engages and disengages the rotary latch, a motor that disengages the latch from the rotary latch, and a space between the motor and the latch. When the striker engages with the rotary latch when the opening/closing lid body is closed, the rotary latch rotates to a predetermined position while resisting the biasing force, and accordingly, the The ratchet is rotationally displaced by the force and engaged with a predetermined portion of the rotary latch to prevent the rotary latch from returning to rotation, and in this state, the ratchet is rotationally displaced in the opposite direction by the motor. The locking device for a vehicle cover is of a type in which when the striker is released from the rotating latch, the rotating latch returns to rotation due to the biasing force, and the striker is thereby released from the rotating latch, and when the opening/closing cover is opened, The rotary member is in contact with the side end surface of the ratchet, and rolls and displaces from the side end surface of the ratchet to approximately the center of the arcuate tip surface when the rotary latch rotates when the opening/closing lid is closed. is provided on the rotary latch, and the latch is arranged on the shaft of the final gear of the gear reduction mechanism so as to rotate together with the final gear, and is rotatably fitted on the shaft and rotated by external operation. An opening/closing lid body for a vehicle, characterized in that a lever is disposed to rotate the final gear in a direction opposite to the biasing direction of the ratchet by abutting a protrusion engaging portion provided on a side end surface of the final gear when the lever is displaced. Locking device.